XK0-005 · Question #232
A Linux administrator receives a call from the network operations team that one of the database applications is down on a Linux server. The Linux server is configured with RAID 1 for redundancy, and…
The correct answer is A. mdadm /dev/md0 --remove /dev/sdb1 C. mdadm /dev/md0 --fail /dev/sdb1. The correct two-step process using mdadm is: (1) Mark the device as faulty: mdadm /dev/md0 --fail /dev/sdb1 (Choice C), then (2) Remove it: mdadm /dev/md0 --remove /dev/sdb1 (Choice A). The syntax always places the array first, then the action flag, then the member device. You…
Question
A Linux administrator receives a call from the network operations team that one of the database applications is down on a Linux server. The Linux server is configured with RAID 1 for redundancy, and the array /dev/md0 consists of two devices called /dev/sda1 and /dev/sdb1. After looking at the status of the RAID 1 array in the /proc/mdstat file, the administrator discovers the RAID 1 array is degraded and the disk /dev/sdb1 on which the database application was installed appears to have failed. Which of the following steps should the administrator take to remove the device /dev/sdb1 from the RAID array md0? (Choose two.)
Options
- Amdadm /dev/md0 --remove /dev/sdb1
- Bmdadm /dev/sdb1 --fail /dev/md0
- Cmdadm /dev/md0 --fail /dev/sdb1
- Dmdadm /dev/sdb1 --remove /dev/md0
- Eracadm --remove /dev/sdb1
- Fracadm --fail /dev/sdb1
How the community answered
(65 responses)- A85% (55)
- B2% (1)
- D8% (5)
- E5% (3)
- F2% (1)
Explanation
The correct two-step process using mdadm is: (1) Mark the device as faulty: mdadm /dev/md0 --fail /dev/sdb1 (Choice C), then (2) Remove it: mdadm /dev/md0 --remove /dev/sdb1 (Choice A). The syntax always places the array first, then the action flag, then the member device. You cannot remove a drive that has not first been marked as failed. Choices B and D have the arguments reversed. Choices E and F use racadm, which is a Dell DRAC/iDRAC remote management tool - not a software RAID management tool.
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